I had to literally fight to hear the ‘a’ turns in m13 and 15 (I could be slightly off with my measure). I told the band directors few students will be able to play them accurately. They let me win the battle to select the cut...with grumbling under their breadth. When we finished they all laughed how poorly they played the turns; glad ‘we’ picked that part.

But yes there are ton of errors and every edition that comes out doesn’t seem to ever fix all the mistakes. I don’t mind the etudes, just wish the kids had to play a few scales and the chromatic. Sight reading is a great way to separate the masses out too.